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3 years ago

ASAP! here’s another that that i can’t figure out!! Please help :)))

Mathematics

1 answer:

GuDViN [60]3 years ago

8 0

Pretty sure the answer is b

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Four 1 1/6 inch wood strips are used to form

worty [1.4K]

Answer:

14/3 in. or 4 2/3 in.

Step-by-step explanation:

Perimeter is the sum of all sides.

P=4s

Fill in known numbers

$P = 4(1\frac{1}{6} )$

Solve

$P=\frac{14}{3}$

5 0

3 years ago

10.

Kay [80]

Answer:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

Step-by-step explanation:

Information provided

$\bar X=32.1$ represent the sample mean

$\mu$ population mean

s=2.4 represent the sample standard deviation

n=83 represent the sample size

Confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The degrees of freedom are given by:

$df=n-1=83-1=82$

The Confidence is given by 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , the critical values for this case are:

$\chi^2_{\alpha/2}=62.132$

$\chi^2_{1- \alpha/2}=104.139$

And replacing into the formula for the interval we got:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

3 0

3 years ago

the figure shows the dimensions of a room in which receptions are held. The room is being carpeted. The three semi-circular part

mars1129 [50]

Answer:

258.39 m^2

Step-by-step explanation:

Solve for the rectangle:

18 • 12= 216

Now solve for the 3 semi circles:

A = 3.14(3)^2= 28.26/2 = 14.13 •3 = 42.39

Add up the areas:

216 + 42.39 = 258.39

8 0

3 years ago

Can someone teach me how to solve this

Lady bird [3.3K]

28.9

Step-by-step explanation:

Multiply the denominator by the number on the other side. This will give you 28.9 as t. To check your work, divide 28.9/8.5. This will give you 3.4.

8 0

3 years ago

Read 2 more answers

I'm confused in this question. Could anyone help me please?

stepladder [879]

Answer:

I think answer is opction no. 2

Step-by-step explanation:

x = C - 5/2

3 0

3 years ago